Health encyclopaedia

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Complications of Allergies

In rare cases, allergic reactions can be very serious. This is called anaphylactic shock. It is a sudden, severe allergic reaction that involves the whole body and it usually happens within minutes of coming into contact with a particular allergen.

The symptoms of anaphylactic shock affect the respiratory and circulatory system, and include raised blood pressure, swelling, and breathing difficulties. Emergency treatment is needed, usually with an injection of a drug called adrenaline.

For more information about anaphylaxis, please see separate encyclopaedia entry.

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